In some areas mice are becoming resistant to the common poisons available and only some very nasty chemicals are effective. You should also pack your food in rodent proof containers as they will find and ruin it in short order.

I used a humane trap baited with dog treat chocolate drops and it quickly resolved my problem. The mice however .....

"...a new rat or mouse Virus that is untreatable has been found in the U/S."

It's not new, but it's rare. There is a group of Hantaviruses, and the one we're discussing here was isolated in Korea in 1978. There was an isolated outbreak in the South West of the United States in 1993, since when there have been 30 reported cases - hardly comparable to bubonic plague.

The virus causes lung disease, and not all cases are fatal. You get the virus by inhaling dust that contains dried rodent faeces/urine. In America the prime culprit appears to be the Deer mouse.

There is no direct evidence that the virus spreads by human contact in America although this has happened in Argentina.

When we had mice many years ago we used the old fashioned mouse traps, the wooden ones with a spring to trap the mouse. Pellets from the council do work. Go to your local council to esquire to see if you can use the council to lay down pellets.